J/A+A/623/A122 Sample of MaNGA galaxies properties (Pilyugin+, 2019)
Relations between abundance characteristics and rotation velocity for
star-forming MaNGA galaxies.
Pilyugin L.S., Grebel E.K., Zinchenko I.A., Nefedyev Y.A., Vilchez J.M.
<Astron. Astrophys., 623, A122 (2019)>
=2019A&A...623A.122P 2019A&A...623A.122P (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Morphology ; Abundances
Keywords: galaxies: abundances - galaxies: kinematics and dynamics -
galaxies: ISM
Abstract:
We derive rotation curves, surface brightness profiles, and oxygen
abundance distributions for 147 late-type galaxies using the publicly
available spectroscopy obtained by the MaNGA survey. Changes of the
central oxygen abundance (O/H)0, the abundance at the optical radius
(O/H)R25, and the abundance gradient with rotation velocity Vrot
were examined for galaxies with rotation velocities from 90km/s to
350km/s. We find that each relation shows a break at
Vrot*∼200km/s. The central (O/H)0 abundance increases with
rising Vrot and the slope of the (O/H)0-Vrot relation is steeper
for galaxies with Vrot≤Vrot*. The mean scatter of the central
abundances around this relation is 0.053 dex. The relation between the
abundance at the optical radius of a galaxy and its rotation velocity
is similar; the mean scatter in abundances around this relation is
0.081 dex. The radial abundance gradient expressed in dex/kpc flattens
with the increase of the rotation velocity. The slope of the relation
is very low for galaxies with Vrot≥Vrot*. The abundance
gradient expressed in dex/R25 is roughly constant for galaxies with
Vrot≤Vrot*, flattens towards Vrot*, and then again is
roughly constant for galaxies with Vrot≥Vrot*. The change of
the gradient expressed in terms of dex/hd (where hd is the disc
scale length), in terms of dex/Re,d (where Re,d is the disc
effective radius), and in terms of dex/Re,g (where Re,g is the
galaxy effective radius) with rotation velocity is similar to that for
gradient in dex/R25. The relations between abundance characteristics
and other basic parameters (stellar mass, luminosity, and radius) are
also considered.
Description:
The publicly available data obtained within the framework of the MaNGA
survey are the base of our current study. We measured the emission
lines in the spectrum of each spaxel from the MaNGA datacubes for a
sample of late-type galaxies. The wavelengths of the Hα line
provide the observed velocity field. We derive rotation curves,
surface brightness profiles, and oxygen abundance distributions for
147 galaxies. These data coupled with the available estimations of the
stellar masses were used to examine the relations between abundance
characteristics (abundances at the centre and at the optical radius,
radial gradient) and basic galaxy parameters (rotation velocity,
stellar mass, luminosity, radius).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 79 147 Properties of our sample of MaNGA galaxies
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See also:
https://www.sdss.org/surveys/manga : MaNGA Home Page
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name MaNGA number, NNNN NNNNN
12- 16 F5.1 Mpc Dist Galaxy distance
18- 22 F5.1 deg PA Position angle of the major axis
24- 27 F4.1 deg incl Galaxy inclination angle
29- 33 F5.1 km/s Vrot Maximum value of the rotation velocity
within the optical radius
35- 39 F5.2 [Msun] logMsp Spectroscopic stellar mas
41- 45 F5.2 [Lsun] logLB Luminosity in B band
47- 51 F5.2 kpc R25 Optical radius
53- 57 F5.2 kpc hd Disc scale length
59- 63 F5.3 --- 12+log(O/H)0 Central oxygen abundance
65- 69 F5.3 --- 12+log(O/H)R25 Oxygen abundance at the optical radius
71- 74 I4 --- NA Number of points (spaxels) with a
measured rotation velocity
76- 79 I4 --- NB Number of points used in derivation
of the final rotation curve
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 07-Aug-2019